An orangutan with breathing problems has undergone what is believed to have been the first sinus operation on such an ape in the UK.
29-year-old Bornean orangutan Vicky underwent the sinus operation at Chester Zoo.
Along with zoo vets and a specialist from Switzerland, a human sinus expert
also helped carry out the operation.
Chester Zoo vet Steve Unwin said Vicky's chronic sinusitis would have often
made her feel "thick headed" and made her more susceptible to picking up
infections. He said the operation would "dramatically
improve things for her".